leathers



Dec: 18, 1928.. 8

w. LEATHERS 31mm PHONOGR-APH COMBINATION Filed May 5. 1922 2 Sheets-Sheet 1 Z W 7 4i 1 Ki 1 B 1 INVENTOR.

Dec. 18, 1928.

w. LEATHERS RADIO PHONOGRAPH COMBINATION Filed May 5. 192g 2 Sheets-Sheet 2 INVENTOK.

Patented Dee. 18,1928.

UNITED T T-Es,

wean Lmrn'nns; or imwon'rn, quasar, Assisi ion, Br missus Assremimirs; l 'ro RADIO CORPORATION; or AMERICA, A CORPORATION or DELAWARE. j r

nspro-riiouoeaarn COMBINATION.

Application filed" Hay 8,

My-inven-tion is for the purpose of" applying a radio actuated vibrator directly to the diaphragm of-a phonograph.

()ne of theobjections to present day radio 6 loudspeakers is the unmusical sound produced'b'y the magnetic diaphragm as is commonto" telephones. "My invention makes it practicable to use. the mica or other highly sensitive and musically-toned diaphragm of' the. phonograph.

'An ob'ect of my invention is to inakethe use of the'same diaphragm possible for both radio and phonograpliic use. l

Anotherobject of my invention is to make 16 it possible to use, for radio receiv ngpur-- poses, the entire phonograph reproducer and amplifying horn as no win common use.

Another object of my invention is to change the same reproducer from phonographic to Eadie receivingusewith the minimum of efort. Another object of my invention is touse the nicely adjusted counter-pressure springs of present day phonographreproducers in the translation of radio received vibrations into sound.

Another object of my invention is to .produce a device whereby whatever-spring .ad-

justnient may be required for correct'radio sound production the. same .neednot be changed in changing fromradio to phonograph reproduction and vice versa. p I have fully'set forth my invention in the following specification andillustrated the :5 same with drawings of which 4 Fig, 1 is a vertical cross-section of my.

device when used with lateral-groove reproducer. I

. Fig. 2 is another view ofthe same.

Fig. 3 is a detail of the same. r J Fig. 4. is a vertical cross-section of the same device showing a modification. i

Fig. 5 is a ve tical cross-section o f'iny de vice when used with a-hill-and-dale reproducer.

Fig. 6 is adetail of the. same. I Fig. 7 shows two right-angled lever-arms. v Fig. 8 is'the same as Fig.4 with a spring ,inodificatipn. v Fig. 9 is ahorizontal cross-section of my device rhen'directly' applied to a phonograph reproducer. r I g I Fig. 10 is a side elevat on of a modification ofiny construction.

Fig. 11 is an end view of Fig. 10.

iszaseria i o. ssgaoa.

1 modified construction. A Fig. 13 is a'detail of holder devices.

In Fig. 1, ,1 s the table, 2 the turn-table;

and 3 the reproduce-ref a phonograph. 4 shows the usual opposed springs used on lat eral-groove instruments, 5 is the stylus, and

.6 is .a frame, or case for my instrument.

a separate case as shown in Fig. 8. In Fig.

few degrees about the knife edge" bearing 8, carrying on its upper ends. slot or groove, or ser es of grooves 9, n which tlie phonograph stylus rests, and having integral with it an armature,- 10, made of suitable metal,

1;. the member 6 may be of any desired size The member Ginaybe merely-a frame, or the a frame may also serve the purposes of a case,- as here illustrated-,- or there may be provided which is vibrated by a coil, 11; The coil,

l] inay be operated by any of the methods common to coils in telephones or loudg speakers, such as a straight electro-niagnetic action or the combined permanent-magnetic and-electro-magnetic action. To this'coil 11', are connected twoelectrie leads (not shown).

such as are common to such devices 0p.

posed-springs, 12 and 13, are provided forv keeping the armature at a suitable distance.

from the magnet. N aturallywhere a per-f nianent magnet is used, the difference in tenstrength of such permanent magnet-that is,

sion on the two springs will vary as the where 11 exercised a constant pull .on the i armature 10, the tension or pull of the spring 12 will be greater than tliat of the spring 13. Dead stops are provided, one on the coil itself to prevent freezing and one at the other limit position as at 14. Theknife-c. 1

edge supports, or bearings 8 may be 'sup.' portedby means shown inFigs. 2 and 3, but

. naturally anyother type of'suitable,sup ports or bearings for-the-lever 7 may-be provided. Also, it-is obvious that any suitable type'of opposing springs such as 12 and 13* maybe used. 12 and 13; are shown-drawn into adjustable tension by the screws-15.

. which turn in plainholes in the housing-6,

and are provided on their innerends with" -threaded nuts of suitable type. It may be preferable to pass the screws, 15, through suitable'slotsor other openings in the springs and the nutsmay have lugs pro'ecting into such slots to prevent turning. 1', naturally, the nuts may be providedwith lugs which catch on the outer edges of the springs thus preventing turning' A very nice degree of adjustment may be obtained in use by the mere change in the length and stillness of the stylus used.

Fig. 2 is the same constructionshown in Fig. 1, turned 90 about the vertical axis. It

, support consistent with the functions which 3 this lever-arm performs.

16 is a piece of suitable metal with suitable V-bearing cut into it, as shown in Fig.3, and is shown held iii-6 byfriction.

Fig.4 shows the construction of Figs. 1 and 2 except that the magnet 11 and the stylus groove 9 are on the same side'of the bearing 8. I

Fig. 5 shows my device designed especially j for use with hill-imd-dale type of phonois 'a function of graph reproducers. The lever arm in this case 15 agamshown straightwith the armature 10 and the needle groove 9. on the same side of the bearing 8,'as in F 4. Where the weight of the reproducer (or portion thereof.) the tension on the diaphragm, as is common to hill-and-dale reproducers, it is obvious that one-way spring action is all that is required in my device, and to make same suitable with the several types of such reproducers in use, with widely varying weights, ittwill be necessary to provide weight resisting spring action adjustable to a reasonably wide range. I have therefore provided a spring, 17 (shown complete in ig. 6) attached to a spindle or shaft to which is attached a worm wheel, 18, turned by a worm, 19, attached to a thumb-nut, 20. Any other type of spring, and an other type of adjust n'ient may be substituted therefor.

In Fig. 7 I have shown two types of rightangled lever arms, the upper one for lateral and the lower for hill-and-dale use. Ob- Yiously a single instrument may be so constructed that by turning the entire nstrument in other words providing it with two bases making approximately right? angles with each other, both types of phono graph reproducers may be operated. The levers shown inFig. '7 may have theineluded angle as much more or less than a right angle as esired.

In Fig. 8 I have shown essentially the same construction as in Fig. 4 with the following -dgh turally this general 1 K simplifications. -The frame, 6, for manufacturing reasons-is used as a; su )po'rt only while the covering is cared for by a housing member, 21. The springs also are simplified, 12 and 13 pressing downward on opposite sides of the bearing 8 and provided with simple tension adjustment screws, 15. The springs in 1, 2, 4 and 8 are shown as interchangeable but they may not be if other construction is preferable.

In Fig. 9 I have shown a modification of my invention in which the radio or electri .ca ly operated elements are attached to or are integrally,constructed withthe' phonoraph reproducer. (Heretofore in this speciication similar numbers have designated similar parts; for Fig. 9 I prefer to use a new nun'iber-series beginning at 100.) is a phonograph reproducer provided with adiaphragm, 101. At 102 is attached the usual. means of diaphragnractuation. It is shown at 102 t rning directly away from the-observer, toward the stylus which communi cates its vibration to 102 through either lateral or hill-and-dale rig. 103 is an armature vibrated by an electro-magnet, 104". This operation may be, as is common to telephone or loud-speaker practice, using pure elect-romagnet or permanent-magnet-electro-magnet combination. 105 is any suitable spring (shown as a flatspring) which may be. used for putting one-way tension on the diaphragm, 101. In Fig. 9 it is shown in contact (when in use) with the vibratory memher, 102, connected to the diaphragm, 101. To 105 is attached the armature, 103, electricallv operated in the manner heretofore described bythe magnet, 104. Tension on the spring, 105, is varied by the adjusting nut and screw, 107, by means of the threaded. part, 108, so constructed that it may slide lengthwise of 107 but cannot rotate. The spring, 109 holds 108 against the lever, 110,

the object of which is to change from phonograph to electric operation and vice versa without changing the adjustment on the f spring 105. When the lever 110 is thrown, as indicated, to the left for phonograph reproduction, the threaded part, 108, slides to the right compressing the spring, 109, which allows the spring, 105, or other-suitablemeans of contact, to come out of engagement with the vibratory part, 102. leaving the phonograph operation entirely independent oft-he electrical. Any other; type of distance device'may be substituted for the lever, 110, which will serve the functionsidescribed, or "110 may be located in'any s uitable position. construction may {be uilt for electric operation only wherein the v12's A distance device may be eliminated if de-' sired. I have shown the electrical: unit, at-i tached to any phonograph reproducer by any suitable means of attachment, A ,c lamps- 111. Naturally electrical eleiii gt'g'nd' pho; I I M I M v i) I' memes nograph reproduce! may be integrally structed if desired. v

'(In Figs. 10 to13 inclusive I ere to use a new number series beginning with 200.)

- In Figs. 10, 11 and 12, 200 is the phono- I aph re roducer and 201 an armature made m such orm that it may be attached tqnthe reproducer preferably-as the stylus is now attached. In the drawing it is'shown as a piece of magnet metal brazed to a stem 202 preferably of hard copper,- hardbrass', phosphor bronze, or other suitable non-magnetic metal. This armature me be attached to the reproducer oriremoved rom the same like a phonograph ,needle. Eleetro-magnet is shown at 203, the function of which is the same as 11 in Figs. 1 to 8, or'104in Fig. 9.

The magnet 203:i's mounted on a frame 204, which is slidably moyed tofadjusted position by any suitable means such as preferably fixedin such po'sitionby suitable means such a screw, or thumb-nut 206'.

The reproducer is supported and'held inco'rrect position-by'any suitable means from the 'same ,base 207 as also holds the magnet assem,

' bly.. Such'suitable means may be an adjustableme'mber 208'held by a screw or screws '209. ,To 209 .may be adjustably attached bracltetsor jaws 210 in whichthe'reproducer rests..- T020801 elsewhere may be attacheda-sprin-g or hlip, or other suitable device 211. The object of the adjustments on the supporting members 208 "and 210, and the spring 211 is naturally to produce a device that can nogm h reprfiducers' 0n the market. ere thls device is madelfor a'sing'le make or type of-reproducer naturally these adj ustments may be eliminated. The base member readily beadjustedto fit the several makes of 207 ma be mounted on another base member v "212 if esired, preferably used for its weight such as lead. The magnet 203 is shown protected by a 'InF1g. 131 have showlf'a which maybe used in place of 20, thus disguard 213 which: slides with it. law-clip 2144 pen'sing with the spring 211. aw-clips like that shown :in Fig. 13 may be made to fit all makes of phonograph reproducers.

, Theinstrument shown in Figs. 10to 13 may be set, while infuse on the phonograph turn-table. The instruments shown in Figs.

1 to 8 me be used the same way, preferably I claim:

between said pole pieces and the plate. 1 WARDLEATHERS.

A sound reproduciiigginstrument com-.

llaiy mounting them on-a' heavy base 113212 in a thumb nut ig. 10. i i 

